营林措施对路域加杨人工林林下植物种间关联的影响  

Effects of forest management of the Populus canadensis plantations on the interspecific association of the under canopy planting in expressway areas

作　　者：吴茜 傅红[1] 郝建锋[2] 齐锦秋[2] WU Qian;FU Hong;HAO Jianfeng;QI Jinqiu(College of Architecture and Environment,Sichuan University,Chengdu 610207,Sichuan,China;College of Forestry,Sichuan Agricultural University,Chengdu 611130,Sichuan,China)

机构地区：[1]四川大学建筑与环境学院,四川成都610207 [2]四川农业大学林学院,四川成都611130

出　　处：《浙江农林大学学报》2023年第4期836-847,共12页Journal of Zhejiang A&F University

基　　金：国家自然科学基金资助项目(31370628);四川省教育厅一般项目(15ZB0020)。

摘　　要：【目的】路域森林已成为现代林业的重要组成部分,但仍存在脆弱性和敏感性等问题,研究不同营林措施对成都绕城高速路域加杨Populus canadensis人工林林下植物种间关联及群落稳定性的影响,可为高速路域人工林提出适当林分抚育措施,以提高其整体生态效益。【方法】以成都第一绕城高速路域加杨人工林为研究对象,采取典型抽样法设置20个样地,以造林开始后未发生任何经营活动的样地为对照,通过方差比率法、χ^(2)检验、联结系数、Spearman秩相关系数、M.Godron稳定性等测度,比较不同营林措施(种植、翻耕、割灌、弃耕、对照)对高速路域加杨人工林林下植物种间关联和群落稳定性的影响。【结果】不同营林措施样地中草本层联结系数从大到小依次为种植、割灌、翻耕、对照、弃耕,其中种植、割灌样地的联结系数大于1,总体关联性为正关联;灌木层联结系数从大到小依次为种植、割灌、对照、种植、弃耕,仅弃耕样地的联结系数小于1,总体关联性为负关联。种间关联分析表明:种植、割灌的灌草层优势种正、负相关种对数呈相反变化趋势,种植、对照主要是对草本优势群落产生影响。M.Godron稳定性分析表明:5种营林措施样地群落整体均不稳定,为演替的初级阶段,其中种植、割灌群落整体稳定性相对较好。【结论】营林措施中,种植、割灌的灌草优势种种间关联强度更好,可促进群落演替更新及高速路域加杨人工林林下植物群落整体稳定性。[Objective]Expressway forest,as an important part of modern forestry,is undergoing common problems such as vulnerability and sensitivity.Therefore,this study,with an investigation into the effects of different forest management measures on the interspecific association of the under canopy planting and community stability,is aimed to put forward appropriate stand rearing measures for the Populus canadensis plantation in Chengdu ring expressway area so as to improve its overall ecological benefits.[Method]First,taking the P.canadensis plantation in the first expressway area of Chengdu as the research object,a total of 20 plots were set up by typical sampling method.Then,with the empployment of the variance ratio method(VR),χ^(2) test,connection coefficient(AC),Spearman rank correlation coefficient and M.Godron stability were measured before a comparative analysis was conducted of the effects of under canopy planting(UP),plow tillage(PT),swamping(SW),abandoned cultivation(AC)and control group(the sample land without any business activities after afforestation as a control group,CG)on interspecific association and community stability.[Result]The VR values of dominant herb species displayed a trend of UP>SW>PT>CG>AC under different management measures,and the VR(>1)values in UP and SW plots demonstrated positive correlation whereas the VR values of dominant shrub species showed a trend of PT>SW>CG>UP>AC and only the VR(<1)values in AC plots showed a negative correlation;Interspecific association analysis showed that the number of species of dominant species in shrub and herb layer with positive correlation displayed an opposite trend from that of those with negative correlation with managing methods PT and SW and the managing methods of UP and CG mainly affected dominant herb species;The stability analysis of M.Godron showed a relatively weak overall stability of the communities in the five forestry measures plots which were all in the primary stage of succession,with the UP and SW communities having the highest over

关 键 词：营林措施 加杨人工林 优势种 种间关联 群落稳定性 

分 类 号：S718.5[农业科学—林学]